Hi. Thanks for your query. Bruising should not occur as this is not normal to have bruises on abdominal wall after hysterectomy at all. This indicates that the hemostasis (control of bleeding) was not proper, or it occurred as a result of reactionary hemorrhage, meaning blood vessels can open up after the blood pressure shoots up during the post-operative period. Clearing up of the bruises was a good indication, but re-appearance of darker bruises indicates that there is bleeding under the skin. Yes, you should be concerned and consult the operating Surgeon immediately to see whether you need a conservative medical approach or surgical exploration for ligating the offending blood vessels.